Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

On Monday the 3rd of March, around 5pm UTC (9am PT) users may experience a brief period of downtime while one of our underlying services is under maintenance.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How do I upgrade from 3.5 without loosing cookies?

  • 2 tontu
  • 1 am na jafe-jafe bii
  • 4 views
  • i mujjee tontu mooy cor-el

more options

How do I upgrade from 3.5 without loosing all cookies? I have tried installing 10 and 13 but neither will read existing cookies and will also essentially delete them. (i.e. when I revert back to 3.5 the cookies are gone.)

How do I upgrade from 3.5 without loosing all cookies? I have tried installing 10 and 13 but neither will read existing cookies and will also essentially delete them. (i.e. when I revert back to 3.5 the cookies are gone.)

All Replies (2)

more options

I have not tried upgrading from 3.5 to 10 or 13, but see no reason why the cookies should be lost.

Are you using multiple versions of Firefox, if so to prevent problems you should use a separate profile for each version. To try to prevent loss of cookies back up your Firefox profile and keep it somewhere safe outside of any firefox program or profile path.

I am not sure what you are now trying to do. If your cookies are already deleted then you now have no cookies to loose on updating. Or is it some other setting or data you are concerned about.

See also

more options

Firefox should import and convert the cookies from a cookies.sqlite file used in Firefox 3.5.

Be aware that websites may invalidate cookies if they detect a browser change via the user agent.

Also Firefox will upgrade SQLite database files if you access such files with newer Firefox versions, making them incompatible with Firefox 3.5.